lawlor



Patented Apr. 10, 1894.

6 v u z a r 6 j a 1/ m.. a m I h mm 111, Lm F \x. mw m S. G. LAWLOR.

PORTABLE BURGLAR ALARM.

(No Model.)

UNITED I STATES PATENT OFFICE.

SIM O. LAWLOR, OF DULUTH, MINNESOTA, ASSIGNOR OF THREE-FOURTHS TO S. GEORGE STEVENS, TIMOTHY W. LEMIEUX, AND WALLACE E. HAR- VEY, OF SAME PLACE.

PORTABLE BU RG LA RI-ALARM.

SPECIFICATION forming part of Letters Patent No. 517,869, dated April 10, 1894.

Application filed April 13, 1893. Serial No. 470,191. (No model.)

To aZZ whom it may concern.-

Be it known that I, SIM C. LAWLOR, a citizen of the United States, residing at Duluth,in the county of St. Louis and State of-Minnesota, have invented certain new and useful Improvements in a Combined Portable Burglar- .Alarm and Lock; and I do hereby declaretlie following to be a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates we combined portable burglar alarm and lock.

The object of the invention is to provide a simple and efficient device which may be easily carried in the pocket and which is adapted to be applied to doors and windows so as to effectively lock the same and adapted to be sounded so as to give an audible notification when any attempt is made to force open the door or window to which it may be applied, the invention being thereby especially adapted for use by commercial travelers and other persons carrying large and valuable stock and who are obliged, by reason of their vocation, to occupy rooms which are frequently without looks or with ineflicient locks.

For a better comprehension of the invention attention is directed to the accompanying drawings, forminga part of this specification and in which- Figure l is a vertical longitudinal section, showing the device as applied to a door and locked, and Fig. 2 is a top view of the same.

In both of the above views corresponding parts are designated by the same letters of reference.

The base a of the device is made of metal either cast or stamped out of a sheet in any suitable way and it is formed at one end into a long narrow shank a inclining toward its forward end an dadapted to be inserted between the edge of the door and its frame or between thetwo window sashes and with a rounded portion a for the reception of the small alarm bell a This alarm bell is to be of any suitable construction so long as it possesses certain characteristics viz., that its clock work mechanism may be wound up and locked and that this clock work mechanism may be started so as to give a single alarm stroke or a series of quick successive strokes. Bells of this variety are now used in many connections, such as for burglar alarms, bicycle alarms and for imitation electric bells. Mounted upon this base a is an arm b adapted to be moved horizontally when desired within the bearings l) and b which are made either integral with the base a or separated therefrom and attached thereto in any strong and substantial manner. One end of this arm I) is formed into a heavy enlarged finger b with which the door or window'will engage if an attempt is made to open the same. The other end of this arm-b is formed into a stud b adapted to engage with and trip the bell mechanism. The arm bis normally held out of engagement with the bell mechanism by means of a small spiral spring a encircling the same and mounted between the bearing 19 and a pin, stud or collar 0' on the arm I). On the extreme endof the shank a is formed a sharp pointed stud or tooth 0 adapted to engage into the door casingor window sash when the device is turned in the position shown in Fig. 1.

Shoulders d, d, are formed in the base a, the object of which is to prevent the main portion of the base from following the shank a into the space between the door and the casing thereof, or between the two window sashes.

The operation of' this invention is as follows: The device is held in the position shown in Fig. 2 with the bell in the horizontal position and the shank a is-introduced into the space between the door and the casing thereof, or between the two window sashes, either by first closing the door or window and then forcing the shank into place or preferably by first bringing the door or window to an almost closed position, then holding the shank a against the edge of the doororwin'dow and with one of the shoulders (1 against the edge, and finally closing the door or window while holding the device in that position. The shank a being thus introduced into the crack between the door and its casing or between the two window sashes, is given a quarter turn whereby the stud or tooth a will engage into the casing or sash, and the finger b will be turned over so as to face the edge of the door or moving part of the window. When an attempt is made to open the door or window it will engage with the finger b which tends to move the arm 12 toward the bell and trip the bell mechanism which will then sound and give an audible notification of the fact that the door or window is being tampered with. When the finger b is moved a short distance toward the bell it will come in engagement with the bearing 1) and further movement thereof will be arrested so that an effective lock will be provided preventing any further movement of the door or window.

Having now described my invention, what I claim as new therein, and desire to secure by Letters Patent, is as follows:

A combined lock and alarm, consisting of the base it provided with a shank a adapted to be introduced into the space between the door and its casing and to be turned, whereby a stud or tooth c on its shank will engage with said casing; an alarm bell 01, secured to said base and having alarm mechanism therein; an arm b mounted on said base, in bearings 19' b and adapted to engage with at one end and trip the bell mechanism; a spring 0 for holding said arm normally out of engagement with said bell mechanism; and a finger b on said arm I) in the path of the door, adapted to move said arm I) and trip the bell mechanism when the door is opened and to engage with the bearing 1) so as to lock the door, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

' SIM O. LAWLOR.

Witnesses:

T. W. LEMIEUX, ELLSWORTH BENHAM. 

